A __________ is when the elements of one set are also elements of another collection.

Which refers to a collection of ordered pairs containing one element from each set?

It refers to any two sets denoted by A and B such that every element of A is also an element of B then A is called subset of B, written A ⊆ B,

Fill in the blank The ______ of sets A and B is the set of all the elements which are common to both A and B

When a set does not contain any element, it is known as __________.

What are the different types of Collections in Python. Give each one of them its defininition and its example.